Toilet seat cover forming machine



Nov. 20, 1934. w. sTAHLY 1,981,155

TOILET SEAT COVER FORMING MACHINE Filed May 11 1951 INVENTOR WW/am Jib/2f ATTORNEY Patented Nov. 20, 1934 TOILET SEAT COVER FORMING MACHINE William Stahly, College Point, N. Y., assignor to Sanitary Public Service Corporation, New York, N. Y., a corporation of Delaware Application May 11, 1931, Serial No. 536,383

6 Claims.

The present invention relates to toilet seat cover forming machines and is more particularly directed toward improvements in such machines adapted to form toilet seat covers from paper in the web.

In Doane Patent No. 1,844,884, granted February 9, 1932, on application Serial No. 410,680, filed November 30, 1929, a form of toilet seat cover forming and vending machine is shown wherein the paper is passed between gear driven male and female rolls, meshing together and adapted to partially sever the web of paper to incompletely form toilet seat covers. The paper is held against the female roll by a gear driven 1'' pressure roll so that the paper withdrawn from the supply roll is kept taut. The female roll is made of metal and the pressure roll of rubber.

In order to press the paper against the female roll with sufficient force, it is necessary to allow 29 very small tolerances in the manufacture of these parts. Furthermore, the action of the rubber roll, paper and metal roll is such that static electricity might be generated in the paper, causing the paper to be charged relative to the metal roll so that it adhered to the metal roll and tended to be carried about by the metal roll to thereby clog the machine.

The present invention contemplates the provision in such a machine of a radially compressible rubber roll which will press the paper against the female roll with sufiicient force to prevent slippage without generating static electricity. It has been found that a toothed rubberroll, whose diameter exceeds the diameter of the pitch circle of the driving gear, may be employed. This toothed rubber roll is deformedagainst the female roll, presses the paper sufiiciently tight to withdraw it from the supply roll without generating static electricity. Furthermore, such a rubber roll may be made with a normal diameter considerably in excess of that of a solid roll which would maintain rolling contact. compressibility of this rubber roll compensates for irre ular location of shaftcenters or sizes of parts, making it unnecessary to work toclose tolerances.

The invention also contemplates the provision of a paper directing roll driven at a speed slightly in excess of the surface speed of the paper and insuring the delivery of the paper in a desired direction.

In machines of the type above referred to, the maleand female rollers are mounted on parallel shafts and connectedtogether: by gears. Thecontour ofthe-slotsin the-femaleroller and theknives in the male roller is irregular on account of the configuration of the toilet seat cover to be formed, and the present invention contemplates the provision of an easily accessible adjusting means to adjust the timing of the male roll relative to its gear, so that accurate placing of the male roll is unnecessary until after the machine has been assembled. H

The accompanying drawing shows, for purposes of illustrating the present invention, one form in which it may be embodied, it being understood that the drawing is illustrative of the invention rather than limiting the same.

In this drawing:

Figure 1 is a perspective View of a toilet seat cover forming machine, the cover being omitted and parts broken away;

Figure 2 is a view showing the developed surface of the female roll and a form of seat cover to be made by the machine;

Figure 3 is an inverted plan view of the male and female rolls;

Figure 4 is a sectional view through the male and female rolls and associated guiding and pressure rolls;

Figure 5 is a view partly in section on theline 5T5 of Figure 4, looking in the direction of the arrows;

' Figure 6 is a perspective view of. a toothedprubber roller; I

Figure 7 is a diagrammaticview illustrating the relative relations of the pitch circles of the gears and the compressible roll; and

Figure 8 illustrates the seat cover.

' The seat cover forming mechanism is enclosed in a housing having a back wall 10, .side walls 11 and 12, a bottom wall 13, and may be closed by a cover, .a fragment of which is indicated .at 16 in the open position. The lower front .wall of the b X has an apron 21, while the lower :front part of the cover has a return bent portion, a fragment of which appears at 22 .in Fig. 4. It is separated from the apron 21 to form a delivery chute for the seat ,cover.

The cover forming and dispensing mechanism is carried by a frame includingframe plates 30 and 31 and tie members,'lone of which is shown at 38. The upper part of the frame has open bearings 34 to receive a rod 36, passing through the center of a roll of paper 37. A drag bar 14 bears on the paper roll as indicated.' The web of paper is passed from the roll 3'7 around the front of a guide roll 38 revolvably carriedonthe tie rod 38. The paper then vpasses about the back or rear side .of the female .roll 39 and against a male roll 40. The rolls 39 and 40 have suitable configuration to form the toilet seat cover of the desired shape and size.

Such a seat cover is indicated in Figure 8. It has a V-shaped lower edge indicated at a and a, and a similar shaped upper edge a and a. The seat cover is also provided with a partially severed, centrally located oval shaped flap, the unsevered portion 0 of this flap being near the lower or front end of the toilet seat cover.

The rolls 39 and 40 are connected together by gears 41 and 42 having a two to one relation, so that the smaller female roll 39 makes two revolutions to one revolution of the larger male roll 40. The machine is, therefore, arranged for making a toilet seat cover whose length equals twice the circumference of the smaller female roll.

The developed surface of the smaller roll 39 is shown in Figure 2. It has helical slots 42a and 42b arranged for cutting the V-shaped ends a,a.' of the toilet seat cover. It also has grooves, indicated at 43a, 43b, 43c, 43d, and 43e, disposed about the surface of the cylinder for forming the flap b. This flap, as indicated in Figure 8, is an oval flap secured to the body of the seat cover atc. As the length of the flap is more than one-half of the length of the seat cover, the grooves 43d and 432 cross the groove 43b, as indicated in Figure 2. This roller may be conveniently constructed by employing sections of cast metal 39a, 39b, 39c, and 89d, as indicated in Figure 2 by the difference in direction of the shade lines, these cast metal sections being finished to provide the grooves, as shown, and being held in place on a metal cylinder 44 by screws indicated at 45.

The maleroll 40 is skeletonized, as shown in the drawing. Three disks 46, 4'7 and 48 are carried on the shaft 42 carrying the gear 42. The central disk carries the flap forming device indicated at 49. It is made from sheet metal inthe form of a fragment of a cylinder and is provided with radiallyprojecting paper tearing edges 50 having a configuration such that they fit into the grooves 43a, 43b, 43c, 43d, and 43c.

The other paper tearing device carried on the male cylinder for forming the ends of the seat cover is. in the form of a sheet metal member indicated at 51. It is secured to all three of the disks46, 47 and 48, and has a radially projecting helical edge 52. adapted to enter the helical slots 42a and 42b of the female roller.

Owing to the two to one relation between the two rollers, it will be apparent that edges 50 and 52 will enter the corresponding grooves in the female roller in proper sequence, so that the seat cover will have the desired length and the flap will be properly spaced within the body of the cover.

The end disk 48 is adjacent the inner face of the gear blank 42 and is adjustably secured to this gear blank by bolts, one of which is indicated at 53. These bolts pass through slots 54. The bolt and slot arrangement provides for the relative angular adjustment of the gear 42 and the male roll, making it possible to adjust these parts sufficiently to insure proper mesh of the gears and easy meshing of the severing devices of the male roll and grooves in the female roll. Thedisks may be clamped to the shaft 42' by, screwsindicated at 55, if desired, so that there is no tendency to twist the male cutting roll. The gear 42 carries a stop pin 56 and is provided with internal gear teeth 57 adapted to drive a cyclometer 58 to count the number of revolutions of the male roll.

The pressure roller which applies the paper to the female cylinder is carried on a shaft 60, suitably mounted in the frame plates 30 and 31 and driven by a gear 62 in mesh with the gear 41. As the gears62, 41 and 42 are in mesh, their speed at the pitch circle is the same as the speed of the paper. This shaft 60 carries a number of pressure rolls 63, such as indicated in detail in Figure 6. These pressure rolls are made of radially compressible material, such as soft rubber. They have a hub portion 64 adapted to tightly fit on the shaft 60 and a plurality of radially extending slots 65 which separate the roller into a number of teeth 66 which extend the entire length of the roll. The outside diameter of the roll 63 is substantially greater than the diameter of the pitch circle of the gear 62, this pitch circle being indicated at 62' in Figure 7. By making the toothed roll of excessive diameter, the teeth are deformed by being bent out of position or squeezed somewhat as indicated in Figures 4 and 7, so that it may press the paper against the surface of the female roll 39.

This causes a very positive pressure suflicient to withdraw the paper from the I supply roll, and at the same'time the movement of the rubber relative to the paper is such that. static electricity is not generated so as to charge the paper relative to the metal roll.

The downward delivery of the seat cover thus formed by the rolls is facilitated by a feed roll '70, suitably supported by the frame in front of. the pressure roll. This delivery roll '70 is driven, by a gear 71 in mesh with a gear 72 carried on the shaft 60. The gear 72 is slightly larger than the gear 62 so'as to revolve the roll mat a surface speed slightly in excess of the surface speed given the paper by the other rolls. This insures that there will be no piling up of the paper above I the pressure roll 63 and prevents its being carried about this roll. It also facilitates pulling the paper out of the grooves in the female roll.

It is obvious that the invention may be embodied inmany forms and constructions and I wish it to be understood that the particular form shown is but one of the many forms. Various modifications and changes being possible, I do not limit myself in any way with respect thereto.

- 1. In a paper handling machine, a revolvable male roll, a revolvable female metallic roll, gears for driving the two rolls in rolling contact, the rolls having pattern forming knives and grooves to cut a web of paper into an article, a guide for applying the paper to the female roll in advance of the meeting point of the rolls, a pressure roll on the other side of the meeting point for pressing the paper against the female roll, and a gear meshing with the gear'carried with the'fer'nale roll fordriving the pressure roll, the pressure roll having radially extending soft fins adapted to be compressed and distorted by the female roller when brought opposite the same.

2. In a paper handling machine, the combination with the grooved metal roll of a pair of male and female rolls adapted to cut a web of paper into sections, of a pressure roll bearing on the paper after cutting for drawing the paper through the machine and keeping it under tension and its ike

center by engagement with the paper so that its surface speed may equal the speed of the paper.

3. A machine for forming toilet seat covers out of a web of paper and dispensing the same, comprising, means for revolvably supporting a roll of paper, drag means for resisting the withdrawal of the paper from the paper roll, male and female metallic rolls meshing together and having a predetermined design to form the seat cover, gear means for driving one roll from the other, a guide between the paper roll and the female roll for applying the paper to the female roll in advance of the meeting point of the male and female rolls, and a pressure roll driven by a gear in mesh with the gear connected to the female roll, the pressure roll being on the other side of the meeting point for pressing the paper against the female roll and comprising radially compressible rubber rolls whose diameter exceeds the diameter of the pitch circle of the pressure-roll driving gear to exert pressure sufficient to Withdraw the paper from the supply roll without generating static electricity.

4. A machine for forming toilet seat covers from a roll of paper comprising cooperative male and female rolls geared together and adapted to receive a Web of paper between them and to form the same into toilet seat covers, a gear driven take-off roll operating with the female roll and pressing the paper against it, and a gear driven guide roll operated at a surface speed in excess of the surface speed of the other rolls and cooperative with the take-off roll to guide the seat cover out of the machine.

5. In a toilet seat cover forming machine, a casing having a back wall, a bottom wall and a front wall extending upwardly a short distance from the front edge of the bottom Wall and forming a narrow apron, a delivery chute formed by the apron and by a casing supported member spaced forwardly from the apron, cooperative male and female rolls mounted in the casing and adapted to receive a web of paper between them and form the same into seat covers, delivery rolls above the apron and acting on the formed seat cover to take it off the forming rolls and deliver it downwardly through the chute, and a gear train for driving the male and female rolls and one of the delivery rolls at uniform effective speed, and for driving the other delivery roll at a speed slightly in excess thereof to insure paper feed in the desired direction.

6. In a toilet seat cover forming machine, a housing having side walls, a narrow front apron across the lower front thereof forming the rear side of a delivery chute, a front wall for the delivery chute spaced from the apron, seat cover forming mechanism including a pair of delivery rolls above the edge of the front apron, one roll in front and the other behind the apron, both rolls being behind the front wall of the chute, whereby the seat cover is delivered through the chute, and gear means for driving the front delivery roll at a speed slightly in excess of the speed of the rear delivery roll to insure downward feed of the seat cover.

WILLIAM STAHLY. 

